Hachy
Hachy is like a trashy version of 100%. You yell it when someone says something so stupid it could make a dead man laugh.
'You think you can beat me?' 'Nah, I got 100% confidence.' 'Hachy? More like Hachy-shit!'
Bro said he could bench 500. I said 'Hachy?' and he fainted.
My dog said he could win the lottery. I said 'Hachy? You're lucky if you find a coin.'